Questions tagged [gsm]
For questions relating to the Global System for Mobile Communications (GSM) when employed for IoT applications.
35 questions
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IoT SIM platform [closed]
I'm looking into building a location tracker. It will contain a GNSS module and a GSM module, the former for getting location coordinates and the latter for transmitting them over to my backend. I'm ...
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174
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Malformed Packet on Mosquitto
I am trying to connect to my mosquitto broker on esp32 with GSM using pubsubclient but sometimes it disconnects to broker with detail malformed packet.
2023-08-30T13:43:14: Client client_id ...
- 11
1
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1
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293
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Best practice way to deal with SIM cards and APNs
In my application there is a 2g/4g modem that I control via AT commands.
In general, what is the approach to knowing what APN to specify when setting up a context? I'm trying to avoid hardcoding (or ...
- 111
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110
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why TCP session is closed when A6/AI GSM connected to mqtt server immediately?
I use A6/AI GSM module to connect mqtt broker through cellular network. it can open tcp session to server but the session terminate immediately. and gsm try to open tcp session again and session ...
0
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213
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Block GSM communication of a cellular modem with AT commands
I have a cellular modem that supports GSM, 3G and LTE.
I want for security reasons to block/disable GSM support, meaning that it will not be able to connect to any GSM BTS.
Partial solutions I came up ...
1
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1
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44
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Why would MKR GSM stop transmitting data to IOT cloud after a certain amount of time transmitting fine?
The device connects to IOT cloud fine and transmits the data for days and sometimes even weeks, but then it will stop transmitting for apparently no reason. On the IOT cloud dashboard the device is ...
- 133
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44
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Are there still any cheap hardware solutions to providing IoT devices with cellular connection with the shutdown of 2g networks
I am currently attempting to design a small custom PCB based IoT business cards that communicate over a cellular network for the purpose of impressing employers. Since I will literally be giving these ...
- 21
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310
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Registering GPRS device with carrier
I am trying to get an IOT device to communicate using GSM GPRS. Forgive me if I am doing something that is blindingly obviously not going to work here.
The device is a weather station
https://www....
- 21
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57
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Serial modem gateway over TCP/IP
I'm not sure how to describe what I'm looking for. I'm working on Linux.
I have a remote device with a 4G SIM card which I need to connect to by dialing in and then running some commands over the ...
3
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1
answer
108
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Bare minimum infrastructure to keep a fleet of IoT devices running and ensure updates to OS and applications?
The number of currently available tools to run and maintain a fleet of IoT devices is staggering. To compare all is not feasible, however a list of the bare minimum required features to look for would ...
- 31
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345
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Send data from GSM module to cloud server like Firebase
I am trying to search for anything to send my sensor data from Arduino + GSM SIM900A to a cloud server, preferably Firebase. Does anyone know how can I achieve this operation to Firebase or any other ...
- 101
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1
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2k
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Connect an esp32 with AWS MQTT with SIM800L
I am are trying to use a sim800L module to connect an esp32 running Arduino to AWS MQTT. I need to connect and publish and subscribe to topics. I am doing this successfully via WiFi. Not via the ...
- 91
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378
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How can I increase the size of the receiving sms Buffer in GSM
Recently I am working on programming IoT Project, to receive messages from the phone. That part worked, but the problem that I am currently facing is that the message does not arrive fully because of ...
- 91
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320
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How to send GPS coordinates to a SQL database from my GPS+GSM device?
I'm getting ready to start building a simple wireless GPS device. This device will use an arduino, and a cellular GSM module paired with a GPS device (an example is the SIM5320a aka the FONA 3G from ...
- 61
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Problem with UART of Fona 3G from adafruit. (aka SIM5320a)
My issue is fairly simple to describe but I have no idea what the problem could be. So I got my FONA 3G and immediately after taking it out of the box, I connected the battery and I wired up my FTDI ...
- 61
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2
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293
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GSM enabled Linux device with USB link
I am looking for a device that runs Linux, has GSM connectivity (given a sim card) and has a USB port. I would like to turn a standard printer into a cloud printer by connecting it via USB to a device ...
- 131
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use Gsm Sim800L To Publish data using MQtt [closed]
I have a Module Gsm Sim800L and I must Publish Data to a nodeRed Server Of IBM Bluemix.
I used the library (Arduino MQTT Library for SIM800 GSM Modem) at this Link :
https://elementztechblog....
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1
answer
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How does APN affect cellular connectivity?
We had recently deployed a few Cellular IoT devices on the field, using SIMs from a certain provider (Airtel India). They had provided us with an APN, but we chose not to program our device with the ...
- 153
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0
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772
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GPS/GSM Tracker not sending location [closed]
I bought GPS/GSM Tracker from eBay but it doesn't work and i can't get Location
Steps I followed:
I bought a new sim card with calls and data (checked that it working)
I installed an app on my ...
- 37
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1
answer
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MQTT Library for Arduino using GSM
I am developing a vehicle tracking device.I want to send data to server through MQTT from my sim808 GSM module.But I couldn't find any good library of MQTT for Arduino. There are so much resources for ...
3
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245
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Alternatives to Siemens Tc65 (GSM modem) as a terminal to process text messages
I'm working on a solution to solve an existing inconvenience. Some "smart" containers send an alarm via text message when they're full. The number it sends to is a personal phone number from a worker ...
- 104
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1
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784
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Connecting a SIM800L to a IBM BlueMix Server via MQTT
I am trying to connect a IoT node to a IBM IoT server via MQTT/GSM. I am using a Sim800L GSM module, and a serial USB device to send the commands to module from my computer. Later on, I will use the ...
- 181
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How to pass two parameters in header using AT Command with SIM800 GSM modem?
I have a restful webservice with POST method. I want to use this webservice using a GSM Modem with SIM800.
I am using following command instruction:
AT+SAPBR=2,1 --Check if bearer 1 is open or not
...
- 181
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1
answer
271
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How to trigger a function in SIM800C Module using an SMS from AWS IOT? [closed]
I am using a SIM800C Module with AWS IoT. I want to be able to trigger some code running on my device by sending an SMS from AWS.
I can generate the SMS OK, but I'm stuck with how to get this to ...
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3
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267
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Calculate velocity and direction on microcontroller or on remote server?
Assume that I have a device attached on a car which includes an MCU, and a SIM908 module. The SIM908's function is to receive GPS data from satellites and then send them to the remote server through ...
- 421
4
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1
answer
2k
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How to transmit binary data over CIP using AT commands?
I'm trying to transmit binary data using Ai-Thinker A6 GPRS module.The problem is that it does not support the AT+CIPSEND=[length] command (looks like a firmware bug). If you use a simple AT+CIPSEND ...
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1
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840
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SSH into an Orange Pi connected to the internet via 2G GSM module
I wanted to SSH into my Orange Pi remotely. It will be connected to the Internet via a 2G GSM module. How should I go about it? Usually it's ssh username@ip address. The setup isn't implemented yet so ...
10
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1
answer
1k
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2G-4G SIM Cards for Cellular Modules, specifically the new NB-IoT [closed]
I'm trying to connect to the NB-IoT network in my city, and I've already gotten the hardware as well as the confirmation that there is an NB-IoT cell tower in my neighborhood.
Naturally, there's an ...
- 203
6
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How will network bootstrapping work for headless embedded-SIM IoT devices?
Is there something akin to the Wi-Fi Alliance DPP (Device Provisioning Protocol) in the world of embedded SIM?1 If so, it would be really nice to get an outline of how it would work at a high level.
...
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720
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Mobile network on Android Things SoM?
I want to build an Android Things device that can report its location via mobile network (4G LTE, LTE-M if possible, 3G & 2G).
How can I plug such a mobile modem and connect it properly down to ...
- 259
8
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2
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462
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IoT 2G wireless data - service providers options in USA
What are the service providers options in USA for IoT 2G data?
Project scenario:
raspberry pi 3 devices that will be collecting data in remote areas
I would buy modem modules compatible with the ...
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6
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2
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2k
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Syntax for using HTTP GET with ampersand and float
I am currently working on a wireless gardening project and quite new to this field.
My sht10 sensor is connected to Arduino Uno and GSM AT commands is used for wireless communication. I am using ...
6
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0
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How to send images using SIM908 GPRS module using LPC2148
I am working on a project in which I have to send an encrypted image via a GSM modem as GPRS or MMS. In this project the transmitter side consists of a PC, ARM LPC2148, and a GSM modem. The receiver ...
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Receiving "ERROR" message from SIM800C module
Most of the commands I send to SIM800C module returns ERROR message to me.
For example:
If I sent AT+CSQ, it returns an expected response.
One of the basics commands that doesn't worked for me is ...
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Can I send my GSM IoT device via airpost? [closed]
Is legal to send my GSM IoT device which is powered by a ~2000 mAh (3.7 V) lithium polymer (LiPo) battery via air post? (Or even take it with me inside my suitcase?)
Also does it make a difference if ...
